Furnace.



Patented Apr. 23, l90l.

R. E. DAVIS.

FURNACE.

(Application flied uly 81, 1900.)

2 Sheets-Sheet l.

I (No- Model.)

Inventor Y wwq ww AttorneyS No. 672,595 Patented Apr. 23, I90I.

- n. E. DAVIS.

FURNACE.

(Application filed July 81, 1900.)

(No Modal.) 2 Shoots-Sheet 2.

Inventor wemw Witnesses Attorneya 1. p UNITED STATES PATENT FFICE.

REGINALD E. DAVIS, OF HAYWARD, WISCONSIN.

FURNACES.

SPECIFICATION formingpart of Letters Patent No. 672,595, dated April 23,1901.

Application filed July 31, 1900.

To all whom, it may concern.-

Beit known that I, REGINALD E. DAVIS, a citizen of the United States,residing at Hayward, in the county of Sawyer and State of Wisconsin,have invented certain new and useful Improvements in Furnaces, of whichthe following is a specification.

My invention relates to improvements in furnaces designed especially forburning sawdust, its object being to provide means for causing moreperfect combustion of the fuel and more perfect control of the fire thanin the ordinary construction.

To this end my invention consists in the improve ments in the grate andattachments hereinafter specifically described and claimed.

In the accompaning drawings, forming part of this specification, Figure1 is a brokenaway perspective view showing the grate and the supportingdevices therefor. Fig. 2 is a detail view of the grate-support andair-supply device. Fig. 3 is a side elevation of a grate-bar, and Fig.4: is a bottom view of the bar.

In the drawings, A represents a furnace of ordinary constructionprovided with the firebox opening 2. Arranged within the fire-boxopening is a dome-shaped grate B, made up of the grate-bars 3. Thebottom of each of these grate-bars rests upon a ring 4:, which in turnrests upon the ledge .5 of the fire-box. The grate-bars are taperedtoward their upper ends to form a dome-shaped grate, as shown in Fig. 1.The upper ends of the gratebars rest upon the top of the centralsupporting device 0. This device is made up of a hollow standard open atits lower end and carrying a detachable top piece 6, provided withperforations 7. The standard is preferably provided with a centralperforate section 8 and is supported by legs 9, carried by the flaringbottom 10 of the standard. The ring 4, which. rests upon the ledge 5 andsupports the grate, may be of any desired construction and made in oneor several pieces, as may be desired. By having the grate of the domeshape shown the sawdust is distributed over a large area and is suppliedwith a greater quantity of air than in the ordinary construction. Byhaving the central Serial No. 25,399. (No model.)

supporting-standard hollow and perforated at its top air is allowed topass to the top of the grate-bars, keeping the same from warping. Theperforations 8, which are arranged in the standard below the grate, willallowa current of air through the standard in case the bottom of thestandard becomes closed by ashes in the ash-pit.

The furnace has only been shown conventionally in the drawings, and itis evident that it can be changed without departiing from the idea ofmyinvention. The fire-box is preferably circular, but may be of anydesired shape.

While my invention is designed particularly for the burning of sawdust,it may be used for the burning of any other suitable fuel.

I claim- 1. In a furnace of the class described, the combination withthe fire-box, of a domeshaped grate arranged therein, a centralsupporting standard resting at its lower end upon the base of thefurnace and abutting at its upper end againstthe top of the dome toserve as a support therefor, said standard being perforated at its upperend and being open at its lower end some distance above the base of thefurnace.

2. In a furnace of the class described, the combination with thefire-box, of a domeshaped grate therein, and a central supporting hollowstandard therefor, said standard being open at both ends and providedWith perforations in its wall below the grate.

3. In a furnace of the class described, the combination with thefire-box, of a domeshaped grate supported therein, a central hollowsupporting-standard for said grate,

REGINALD E. DAVIS.

Witnesses:

SAM J. WILLIAMS, B. W. SKEEDER.

